This study had two parts, a Core Part and an Extension Part. The Core Part of the study was a randomized, multicenter, double-blind, placebo-controlled parallel-group study in patients with secondary progressive multiple sclerosis (SPMS). Eligible patients were randomized (2:1) to receive either siponimod or placebo. The duration of the Core Part of the study was variable for each patient, given that this was an event-driven study and terminated when a pre-defined number of confirmed disability progression (CDP) events had occurred irrespective of duration of individual patient participation. Patients who had 6-month CDP during the Treatment Epoch of the Core Part were provided with options that included starting treatment with open label siponimod as rescue medication.
Patients who were eligible to enter the Extension Part received open label siponimod.
